Michael从倾斜的坡道中滑下来，原来底下是一个大型垂直排水管的最底端，这个排水管好似一个竖井。
He emerges from the sloped pipe of the very bottom of a huge vertical drainpipe resembling a silo.
Michael告诉他哥哥，他找到了通往医务室大楼的路径，但他需要想个办法出来，能够不用梯子就爬上20英尺高的垂直排水管。
Michael tells his brother that he found their access to the infirmary building, but he'll need extra time to find out how they'll get up a twenty foot vertical drain pipe without a ladder.
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